From c3917c61d3d70694391327b3f3bc64de1b6cbc01 Mon Sep 17 00:00:00 2001
From: Jakob Ketterl <jakob.ketterl@gmx.de>
Date: Tue, 28 Sep 2021 17:46:18 +0200
Subject: [PATCH] fix audio compression switching

---
 csdr/chain/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/csdr/chain/__init__.py b/csdr/chain/__init__.py
index 99fe821..b9af86a 100644
--- a/csdr/chain/__init__.py
+++ b/csdr/chain/__init__.py
@@ -115,7 +115,7 @@ class Chain(Module):
         removedWorker.stop()
 
         if index == 0:
-            if self.reader is not None:
+            if self.reader is not None and len(self.workers):
                 self.workers[0].setReader(self.reader)
         elif index == len(self.workers):
             if self.writer is not None: